package com.atguigu.spzx.manager.service.impl;

import com.alibaba.excel.EasyExcel;
import com.atguigu.spzx.common.exception.GuiguException;
import com.atguigu.spzx.manager.listener.ExcelListener;
import com.atguigu.spzx.manager.mapper.CategoryMapper;
import com.atguigu.spzx.manager.service.CategoryService;
import com.atguigu.spzx.model.entity.product.Category;
import com.atguigu.spzx.model.vo.common.ResultCodeEnum;
import com.atguigu.spzx.model.vo.product.CategoryExcelVo;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.CollectionUtils;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;

/**
 * Author:L枣
 * Date:2024/9/14
 */
@Service
public class CategoryServiceImpl implements CategoryService {

    @Autowired
    private CategoryMapper categoryMapper;

    @Override
    public List<Category> findCategoryList(Long id) {
        //1、根据id条件进行查询，返回list集合
        List<Category> categoryList = categoryMapper.selectCategoryByParentId(id);

        //2、遍历返回的list集合，判断每一个分类是否有下一层分类，如果有设置：hasChildren=true
        if (!CollectionUtils.isEmpty(categoryList)){
            categoryList.forEach(category -> {
                //判断是否有下一层
                int count = categoryMapper.selectCountByParentId(category.getId());
                if (count > 0){
                    category.setHasChildren(true);
                }else {
                    category.setHasChildren(false);
                }
            });
        }

        return categoryList;
    }

    //导出
    @Override
    public void exportData(HttpServletResponse response) {
        try{
            //1、设置响应头信息和其他信息
            response.setContentType("application/vnd.ms-excel");
            response.setCharacterEncoding("utf-8");

            // 这里URLEncoder.encode可以防止中文乱码 当然和easyexcel没有关系
            String fileName = URLEncoder.encode("分类数据", "UTF-8");

            //设置响应头信息
            response.setHeader("Content-disposition", "attachment;filename=" + fileName + ".xlsx");


            //2、调用mapper方法查询所有分类，返回list集合
            List<Category> categoryList = categoryMapper.findAll();

            List<CategoryExcelVo> categoryExcelVoList = new ArrayList<>();

            //3、调用EasyExcel的write方法，把list集合写入到excel中
            for (Category category : categoryList){
                CategoryExcelVo categoryExcelVo = new CategoryExcelVo();
                BeanUtils.copyProperties(category, categoryExcelVo);
                categoryExcelVoList.add(categoryExcelVo);
            }
            EasyExcel.write(response.getOutputStream(), CategoryExcelVo.class)
                    .sheet("分类数据").doWrite(categoryExcelVoList);

        }catch (Exception e){
            e.printStackTrace();
            throw new GuiguException(ResultCodeEnum.DATA_ERROR  );
        }

    }

    //daoru
    @Override
    public void importData(MultipartFile file) {

        ExcelListener<CategoryExcelVo> excelListener = new ExcelListener(categoryMapper);
        try {
            EasyExcel.read(file.getInputStream(), CategoryExcelVo.class,excelListener)
                    .sheet().doRead();
        } catch (IOException e) {
            e.printStackTrace();
            throw new GuiguException(ResultCodeEnum.DATA_ERROR);
        }
    }
}
